concrete lathe, concrete milling machine and others

[fizzy]

No substitute for good old cast iron, I wonder how long it would last on a lumpy interrupted cut.

Some of the most accurate and very expensive cnc machines use epoxy granite now!

The Swiss have been using it since the 80s.

https://www.youtube.com/user/FritzStuderAG

 

[Seadog]

Not ice, pykrete

A very interesting chap. There's a book, out of print, that details his inventions.

 

[pedrobedro]

What about a ship made of ice, then?

Ice mixed with sawdust was experimented with, pure ice was not strong enough. Just spotted Chris' post

 

[Seadog]

Well done you two. Churchill's Iceman.

 

[Rig Pig]

Some of the most accurate and very expensive cnc machines use epoxy granite now!

The Swiss have been using it since the 80s.

https://www.youtube.com/user/FritzStuderAG

As a damper, to increase the weight and reduce vibration, I bet the bed is still a cast iron lattice buried inside it.

 

[fizzy]

As a damper, to increase the weight and reduce vibration, I bet the bed is still a cast iron lattice buried inside it.

I don't think so

 

[Rig Pig]

I don't think so

That some good stuff then!

 

[fizzy]

This is incredible - I have watched it many times in the past.
The bed is made from granite sections glued together with epoxy. Accurate to 1 micron.
All air bearings etc.

 

[fizzy]

Mind you as someone originally said - would you use these machines for roughing and taking heavy cuts? I doubt it

 

[gaz1]

though fizzy i find yours an interest as it would mean grinding on a lathe was viable compared to the old ones where grinding was certainly a no no due to damage to the bed of a lathe

so epoxy lathe would be a really good reference

all depends on wear and tear on the machines

 

[Rig Pig]

though fizzy i find yours an interest as it would mean grinding on a lathe was viable compared to the old ones where grinding was certainly a no no due to damage to the bed of a lathe

so epoxy lathe would be a really good reference

all depends on wear and tear on the machines

You would still have the issue of all that horrible abrasive dust, I won't even grind in my workshop, I hate the thought of that muck on any of the slides! When I finally get round to building a t&c grinder it's going to be heavily guarded and operate a flood coolant system! I may even plumb it into an extract system.

 

[cheb]

There's also Pyke - The Unknown Genius, by David Lampe. OOP, but easily available by the look of it.

 

[Seadog]

I have that book. It's an interesting read.

 

[cheb]

It is, it's a long time since I read it

IIRC his work is also discussed in Most Secret War by Gerald Pawle. That's worth reading too for all the other inventions mentioned.

 

[fizzy]

Mythbuster made some boats out of ice and newspapers IRC.

 

[Seadog]

The interesting thing about Pyke's design is that it had an on board freezer and embedded pipework which was used to construct the vessel, but then it could continually "repair" itself.

 

[gaz1]

ive figured a way on how to make a concrete planer machine

im just curious is there really any need for the old style metal planer it can be either by hand or by motor

i prefer the motor reference

i like the milling machine not used it yet

rough reference i can build it capable of planing 9" - 10" wide steel, havent decided on how high yet

 

[Pete.]

I've got some large blocks of black granite at work - probably 3 foot cubed and a couple of tons each. Getting smashed up next week.

 

[Cobbler]

A concrete aeroplane sounds like it would go down like a lead balloon Ordinary concrete was used to make boats and barges, wreckage of one appears at low tide near Whitby Scar.

There’s several concrete barges left on the banks of the Severn at the ship’s graveyard at Purton, also there used to be a diving charter boat called Chalice at Falmouth that was built with a concrete hull.

https://www.tripadvisor.co.uk/Attra...ips_Graveyard-Berkeley_Cotswolds_England.html

 

[MBB]

SS Cretewheel Concrete tugboat sank at Newbiggin by the sea during the first world war. They've been around for along time.